Complete AR-15 16″ 5.556/.223 Upper with 15″ Flat Dark Earth (FDE) Air Lite M-Lok Hand Guard Upper includes a 16″ barrel tipped with A2 flash hider/suppressor. A3 billet upper receiver comes with forward assist and ejection port cover installed. Barrel and receiver have matching M4 feed ramps. Heavy duty M16 bolt carrier group and mil-spec charging handle included. Comfortable 15″ free floating M-Lok hand guard. The gas system is carbine length and comes with a low profile micro gas block. Cycles both 5.56 NATO and .223 ammo. This high quality upper is a perfect fit on any 5.56 or multi-cal AR-15 lower. Swap the complete upper and you’re ready to shoot! Comes with the Barrier Defense lifetime warranty!  ****Know your states laws when purchasing gun parts.****